The mother orca, known as Tahlequah or J35, has been seen carrying the body of the deceased female calf since Wednesday, the Washington state-based Center for Whale Research said in a Facebook

Mr. Hanson said on Thursday that he did not know why the female calf, who lived for a few days during the last weeks of December, had died. The mother, one of only a few dozen of its type of orca, was seen carrying the dead female calf on Wednesday, though might have been doing so for longer.

There appears to be new heartache for the orca nicknamed Tahlequah after researchers spotted her on Wednesday carrying her new calf on her head, much the way she did another calf six years ago.